四单元知识点。
1.频率副词:一般用来表示动作发生的次数、频率。
常见频度副词按频率大小排列如下:
always(100%)>usually(80%)>often(60%)>sometimes(40%)
共同点:放于主语后面,动词前面。
例: i usually do homework .
i often read books .
i sometimes watch tv.
sometimes位置灵活,句首、句中和句末都可以。
例:sometimes i go to the cinema .
i sometimes go to the cinema .
i go to the cinema sometimes .
2. 第三人称单数:
首先,要清楚第。
一、第二、第三人称各是什么。第一人称就是“我”和“我们”。第二人称是“你”和“你们”。第三人称单数是“他”、“她”和“它”,复数则是“他们”、“她们”和“它们”。
第三人称单数有:
人称代词he, she, it, 单个人名(danny, li ming, tom, my mum …)单数可数名词(the car )。
在一般现在时的句子中,当句子的主语为第三人称单数时,句子中的动词要相应地采用单数形式,即第三人称单数形式,也称“三单”或“单三”。
动词第三人称单数的变化规则:
1. 大部分的动词,构成第三人称单数时,直接加-s。
如:read-reads, play-plays, listen- listens, take-takes, climb-climbs, clean-cleans , write-writes , cook-cooks 。
2.当动词词尾是-s,x,ch,sh时,构成第三人称单数时,加-es。
如:watch-watches, wash-washes 。
3.动词词尾是-o的话,需要在词尾加-es构成第三人称单数。
如:do-does, go-goes。
4.特殊情况,h**e的第三人称单数为has。
句子练习:要点:1.句子的主语是第三人称而且还是单数。2.还经常和频率副词连用。
often reads books .
often writes emails .
yang often plays the piano .
often takes pictures at the weekend.
goes fast .
my dad cooks the meal .
ming often cleans the window at saturday.
3. 陈述句变一般疑问句变化规则:
句中有“is, are或can”的句子,把“is, are或can”提到句首。
例如:陈述句:he is from australia .变成一般疑问句:is he from australia ?
陈述句:jenny can wash clothes . 变成一般疑问句:can jenny wash clothes ?
陈述句:we are going to help grandpa li . 变成一般疑问句:are you going to help grandpa li?
句中没有“am, is, are或can”的句子,如果主语是第一人称、第二人称或第三人称复数的句子,句首加“do”, i,we”变成“you”,句号变问号,其余单词不变。
例如:陈述句:i can clean the floor . 变成一般疑问句:can you clean the floor ?
陈述句:i often climb the hill at the weekend . 变成一般疑问句:
do you often climb the hill at the weekend ?
陈述句:i live in beijing . 变成一般疑问句:do you live in beijing ?
句中没有“am, is, are”的句子,如果主语是第三人称单数时,句首加“does”, 动词三单形式还原成动词原形,句号变问号,其它单词不变。
提醒:在句首加does,第三人称已经通过does体现出人称的变化了,所以动词要用动词原形,不能再用动词的三单形式了。)
例如: 陈述句: peter often plays the violin at the weekend .
变成一般疑问句:does peter often play the violin at the weekend ?
陈述句:he often does housework .
变成一般疑问句:does he often do housework ?
注意:变为疑问句的第一个单词的第一个字母必须大写。
4.询问周末做什么的特殊疑问句:用特殊疑问词what引导。
句式基本结构:what+助动词(do或does)+主语+频率副词+do+其他?
询问第二人称的周末活动:
what do you often do at the weekend ? i often take pictures .
询问第三人称单数的周末活动:
what does your mother do at the weekend ? she often goes shopping.
what does peter do at the weekend ? he often listens to music .sometimes he plays the piano.
what does danny usually do ? he usually plays football .
难点单词和句子:
a nice weekend ! 周末愉快!
2.在周末:at the weekend
的书写没有空格,不能写成some times
h**e a picnic on saturday.让我们周六去野餐。let’s完整形式 let us
5.需要注意的几个动词短语三单形式:goes fishing ,goes shopping ,goes to the cinema , goes to the museum, does homework ,does housework ,washes clothes ,washes the dishes ,watches tv.
6.句子:sometimes i go to the park .和i sometimes go to the park .意思一样,都是我有时去公园。
易错读音:易错词组:
1. play +the +乐器:play the violin play the piano play the drums
+球类: play football play basketball play ping-pong
3.区分读音和意思:(watch tv wash clothes) (do housework do homework)
4.区分介词的使用:at the weekend on saturday on sunday
四单元动词:
go, do, help, h**e, visit, take, listen, read, play , watch, wash , write ,四单元主题作文:
my family’s weekends
we h**e nice weekends .my father often does housework at the weekend .sometimes he goes fishing .
my mother often washes clothes .sometimes she goes shopping. i often read books .
sometimes i go to the library .i like reading very much .i like my weekends .
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